1025424221 has 2 divisors, whose sum is σ = 1025424222. Its totient is φ = 1025424220.

The previous prime is 1025424199. The next prime is 1025424223. The reversal of 1025424221 is 1224245201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729756196 + 295668025 = 27014^2 + 17195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025424221 - 2¹⁰ = 1025423197 is a prime.

Together with 1025424223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025424223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512712110 + 512712111.

It is an arithmetic number, because the mean of its divisors is an integer number (512712111).

Almost surely, 2^1025424221 is an apocalyptic number.

It is an amenable number.

1025424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025424221 is an equidigital number, since it uses as much as digits as its factorization.

1025424221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1025424221 is about 32022.2457207486. The cubic root of 1025424221 is about 1008.4039166734.

Adding to 1025424221 its reverse (1224245201), we get a palindrome (2249669422).

The spelling of 1025424221 in words is "one billion, twenty-five million, four hundred twenty-four thousand, two hundred twenty-one".